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Question

Review View Help Tell me what you AaBbCcDd AaBbCcDd AaBbC AaBbCct AaB AaBbo 1 Normal 1 No Spac.. .Heading 1 Heading 2Title Subtitle Subt Paragraph Styles 1. Question 1. Under these conditions of monogamy, what would you expect to happen 2 Question 2. Assuming.tbat female resistance to seminal fluid involves some costs to the toxicity of seminal fluids over the course of the selection experiment? Why? what would you expect to happen to female resistance to seminal fluids over the course of the selection experiment? Use the information in Figure 1 to answer questions 3 through 5 3. 12 1.3 T 1.2 0.9 Monogamy^ Monogamy B ? ? Control A ? Control B 0.8 Reproductive rate (test 9 Survival (test 9 Fecundily (test 9 continuously housed) mated once) mated once Figure 1 Females of the same genotype with markers (test females) were exposed to either males from the lines that had been evolving in monogamy (monogamy lines) or males from the control lines (control mailes). The females were housed continuously with both types of males or were paired individually with the two types of males. (Holland, B. and W.R Rice. 1999. Experimental removal of sexual selection reverses intersexual antagonistic coevolution and removes a reproductive load. PNAS 96: 5083-5088dol: 10.1073/pnas 96.9.5083 a tent/90/9/5083full, C 19991 National Academy of Sciences, U.SA) Question 3. Relative to the test females mated to control males, do the test females mated to the monogamy males have greater or shorter survivorship? Is this consistent with the expectations? 5. 6. Question 4. Relative to the test females mated to control males, do the test females mated to the monogamy males have higher fecundity? Question 5. Based on this graph, do females housed with monogamy males have greater or lower reproductive success than females housed with control males? 7. IF

Explanation / Answer

Question 1) It is possible that the toxicity had no effect on monogamous females, but beneficial effects; however, it is probable that once they have had sexual contact with a male (monogamy) and after with other males, this could be toxic because their body would have gotten a sensitivity to other males.

Question 2) If the seminal fluid is toxic, as the experiment moves forwards, the seminal fluid will be more toxic than in the ealier generations of females. This could be caused becauce once a person hasn't been in touch with a material (such as the people who don't drink milk anymore and later they can not consume milky products), this could be a similar situation.

Question 3) They have a greater survivorship. This is not consistent with the expectation, since the article displays some references ralted to this topics and they mentioned that seminal fluid is toxic for females.

Question 4) No, they don't have higher fecundity, since we can observe on the image that both groups present almost the same relative value.

Question 5)Monogamous females showed a greater reproductive sucess as we see on the image. The relative value of monogamous females is higher than the relative value of not monogamous females.

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